Valve arm construction



L.. G. HILKEMEIER VALVE ARM CONSTRUCTION Filed July '7, 1957 llltllllgmc/who@ v I the travel or throw of the valve plugs, and therearm i5which is arranged to be oscillated by 15 Patented Aug. 23, 1938 UNITEDSTATES PATENT OFFICE VALVE Attivi CONSTRUCTION Louis G. Hilkemeier,Milwaukee, Wis., assignor to Chain Belt Company, Milwaukee, Wis., acoi'- poration of Wisconsin Application July 7, 1937, Serial No. 152,423

4 Claims. (Cl. WL-600) The invention relates to valve arm construcinFig. 2 as seen from the right of said figure, tions and has for itsprincipal object to provide and an improved valve arm for concrete pumpsof Fig. 4 is a horizontal sectional plan view taken the type genericallydisclosed in the prior U. S. approximately on the plane indicated by theline '5k Patent No. 2,017,975, granted October 22, 1935, filll of Fig.2, looking down.

to Jacobus C. Kooyman. In the said drawing, the pump comprises a As isfully disclosed in said Kooyman patent, working cylinder IB mounted upona suitable these pumps employ inlet and outlet valves of frame orchassis l I and having associated with the oscillating plug type whichare moved from it an inlet valve l2 and an outlet valve i3. Since oneposition to another by means of cam-acthe said valves are or may beidentical in con- 10 tuated rock levers which are connected by Valvestruction, the following disclosure will be conactuating rods to armsrigidly mounted upon the fined to the valve l2. Valve shafts. As islikewise disclosed in said The said valve isprovided with a valve shaftKooyman patent, it is desirable in order to vary Hl to one end of whichis rigidly secured a valve eriv by accommodate the pump to plasticmixtures means of an actuating rod I6 extending from containing diierenttypes and/or sizes of agthe arm l5 to a rock lever il which is adaptedgregate that the pivotal connection between the to be oscillated bymeans of suitable cams conactuating rod and the valve arm be capable oftained within a housing Il and mounted upon e0 adjustment toward andfrom the axis of the the Crank Shaft I3 Of the Pump, all as iS fullyvalve shaft. In other words, since the throw of dSClOSSCl ll SaidKOOYmal'l llteltthe cam actuated rock levers is constant, if the TheValVe afm @Onstfuctlon CenstltU-tflg the iooation of the pivotalconnection between the presentinvention embdles a hub Whwh mayconnecting rods and the valve arms be moved be provided With a bore i9.having suitable keyinwardly or outwardly relative to the axis of the Way2| .for eoeperaten Wlth a key earned by 25 valve shafts, the throw ofthe valves may be the Valve .Shaft le and the eald heb may fur'correspondingly decreased or increased accordther be Slant as at 22 andproVlded Wlth apertures ing to the type of aggregate in the mixturebeing 23 for JChe reception of bolts, not shown, by pumped. means ofwhich 1t may be rigidly clamped upon The present invention has for itsprincipal Ob said valve shaft. Integral with the hub 20 is a 30 ject toprovide a construction whereby this pair of alined laterally spaced arms25 which, change in the location of the pivotal connection ehaies flol;geagghtf fegeryfrlg between the valve arm and connecting rod relaextendradially from the said hub The said Uve to the ams of the Valve Shaftmay be readlly arms are each provided with longitudinally exeecled Wlthamlmmum of troubleend delay'. tending slots 2t wnien terminate at oneend in Wlth Phe above and other (.bJFBCtS m new the enlarged apertures2l for a purpose which which will appear as the description proceeds, Wmappear more muy below The Outer face the kinvention consists in thenovel details of of each arm is provided with a pad 2E having 40constructlon and combllatlons of 'parts more a plurality of transverselyextending serrations 40 fully hereinafter described and particularly 29disposed-along the. Slots g3 as Wm be readily pointed out in theappended claims. understood from Figures 2 and 3.

Referring to the accompanying drawing form- The actuating rod |55 isprovided With an eye ing part of this specification, in which like ref-3@ joumaued upon the body portion 3g of a, erence characters designatelike parts in all the tubular sleeve c2 which is positioned between the45 VieWS- arms 25. The said sleeve s2 has the netted end Figure 1 iS 8diagrammatl@ Side elevational portions 33 which are slidably received inthe view of a concrete pump of the Kooyman type opposed slots 25, seeFig. 4. A pin or bolt 35 showing valve arms constructed in accordance 35having a head 36 on one end is passed through with the present inventionapplied t0 the inlet the bore of sleeve 32 and has its opposite end 50and Outlet Valves tlleISOf; threaded as at 3l. A washer member 38 isFig. 2 is an enlarged side elevational View of mounted upon the pin 35adjacent its head and one oi the arms together with a portion of the isprovided with teeth or serrations 39 adapted actuating rod therefor; toengage with the serrations 29 of the com- Fig. 3 is an elevational viewof the parts shown panion arm 25. A nut 4l! is threaded upon the 55other end of the pin 35 and it likewise is provided with teeth orserrations 4I arranged to engage and co-act with the serrations 29 ofthe other arm 25.

The body portion 3l of sleeve 32 which constitutes a bearing member forthe eye of actuating rod I6 is of a diameter greater than the width ofthe slots 26 but of such dimensions that it may be passed through theenlarged apertures 2l in the arms whereby it may be introduced to aposition between the arms whereupon its reduced end portions 33 may beslidably received in the said slots. In this manner the parts may beassembled, it being understood of course that the eye 3i] of theactuating rod I5 is rst alined with the apertures 2l whereupon thesleeve may be introduced through one of said apertures until its bodyportion is alined with the eye whereupon the parts may be dropped intothe slots 25.

The position of the axis of pin 35 relative to the axis of the valveshaft I4 may be determined by engaging the serrations of the washer 38and nut e0 in the proper serrations of the arms 25, whereupon byinserting the pin or bolt 35 in the sleeve bore and screwing it home inthe nut il@ the parts may be effectively locked in this position. Itwill be noted that both the washer 38 and the nut lil are recessed as at42 to accommodate the outer ends of the reduced portions 33 of sleeve32.

Obviously, change in the position of the pivot pin 35 relative to theaxis of Valve shaft I may be quickly and easily accomplished by backingoff on the pin 35 until the serrations of the washer 38 and nut d0 canbe disengaged from those of the arms 25, whereupon the actuating rod IEand sleeve 32 may be moved inwardly or outwardly as the case may be tothe new position, whereupon the teeth or serrations of washer 38 and nut@Il are again engaged with those of arms 25 and the pin 35 again screwedhome. During this operation the actuating rod I6 cannot becomeinadvertently disengaged from the valve arm, since the parts can only bedisassembled through elevating the rod I6 to bring its eye 30 intoalinement with the enlarged apertures 2l so that the sleeve 32 can bemoved axially therethrough.

While one form of the invention has been illustrated and described it isobvious that those skilled in the art may vary the details ofconstruction as well as the precise arrangement of parts withoutdeparting from the spirit of the invention and therefore it is notwished to be limited to the above disclosure except as may be requiredby the claims.

What is claimed is:

l. In valve arm construction, a hub arranged to be rigidly secured to avalve shaft, having a plurality of laterally spaced arms extendingoutwardly therefrom, said arms having complementary longitudinallyextending slots therein, and a side face of said arms having transverseserrations along said slots; a pin slidably mounted in said slots andbridging the space between said arms, for pivotally connecting anactuating rod between said arms; serrated means carried by said pinarranged to be variably engaged with the serrations of said arms todetermine the position of the pin relative to the axis of the valveshaft; and means for retaining the pin in such determined position.

2. In valve arm construction, a hub arranged to be rigidly secured to avalve shaft, having a plurality of alined laterally spaced armsextending outwardly therefrom, said arms having complementarylongitudinally extending slots therein, and the outer faces of said armshaving transverse serrations along said slots; a pin slidable in saidslots for pivotally mounting an actuating rod between said arms; andoppositely disposed members carried by said pin having serrationsarranged to be variably engaged with those on said arms to determine theposition of the pin relative to the axis of the valve shaft, one of saidmembers being threaded upon said pin, whereby the parts may bepositively retained in a determined position.

3. In valve arm construction, a hub arranged to be rigidly secured to avalve shaft, having a pair of alined laterally spaced arms extendingoutwardly therefrom, said arms having alined longitudinally extendingslots therein, and the outer faces of the arms having transverseserrations along said slots; a sleeve mounted between said arms havingreduced end portions slidably received in said slots, said sleeveconstituting a bearing member for pivotally mounting an actuating rodbetween said arms; a headed and threaded pin extending through saidsleeve; a washer carried by said pin adjacent its head, having aserrated face arranged toI be variably engaged with the serrations onone of said arms; and a nut threaded on the other end of said pin,having a serrated face arranged to be variably engaged with theserrations on the other of said arms.

4. In valve arm construction, a hub arranged to be rigidly secured to avalve shaft, having a pair of alined laterally spaced arms extendingoutwardly therefrom, said arms having alined longitudinally extendingslots therein terminating at one end in enlarged apertures, the outerfaces of said arms having transverse serrations along said slots; asleeve having a body portion of a diameter greater than the width ofsaid slots but passable through said enlarged apertures to a positionbetween said arms to constitute a bearing member for pivotally mountingan actuating rod, said sleeve having reduced end portions slidablyreceived in said slots; a headed pin extending through said sleeve; andserrated means including a nut threaded on said pin, arranged to bevariably engaged with the serrations on said arms to determine theposition of the pin and sleeve in the slots relative to the axis of thevalve shaft.

LOUIS G. I-IILKEMEIER.

